Elai Katz - Antitrust Lawyer - McDermott Will & Emery


Elai Katz is a strategic antitrust lawyer with over two decades of experience handling mergers and acquisitions, litigation, counseling and government investigations. He represents buyers and sellers across a range of industries, including financial services, insurance, healthcare, life sciences, online retail, beverage, airline, and media and telecommunications.

Clients value Elai’s ability to provide concise and pragmatic advice, explaining complex issues in simple terms. They turn to him for a practical, creative and informed lens on their antitrust matters. As clients have noted, “Elai is known for his great working relationship with regulators, wonderful legal services and deep industry knowledge” and he “keeps a cool head in critical situations.”

Show More


  • Obtained regulatory clearance in multiple acquisitions for numerous clients in the financial services, insurance, healthcare, life sciences, digital commerce, beverage and airline industries, among others*
  • Successfully defended a global financial services company in a foreign exchange markets class action, winning a jury verdict following an eight-day trial*
  • Represented scholars and experts in antitrust economics as amici curiae in the Supreme Court of the United States case Ohio v. American Express Co.*

Show More


  • The Best Lawyers in America, Antitrust Law, 2017-2024
  • Chambers USA, 2008-2024
  • Legal 500, Recommended, 2024
  • The International Who’s Who of Competition Lawyers, Thought Leaders – Global Elite, 2024
  • Benchmark Litigation, National Practice Area Star and Litigation Star, 2023
  • Lawdragon 500, Leading Litigators in America, 2022


  • American Bar Association, Antitrust Section, vice chair of the International Comments and Policy Committee
  • Yale Library Associates, trustee
  • Yale University Library Council, member
  • New York State Bar Association, Antitrust Law Section, former chair of the Executive Committee



Columbia Law School, JD, 1996
Yale University, BA, 1992

New York

Show More